Talk:Dsh

From OLPC

I installed dsh on my XS 0.4 test platform, following the instructions on the dsh homepage to compile from source. I already had all the dev tools I needed except for gcc-c++, though I forget if I installed those prior. I had a slight issue with where make install put these libraries:

Dsh looks for these in /usr/lib, so I just copied them all over to /usr/lib and then dsh worked. Also, it puts dsh.conf in /usr/local/etc instead of /etc/dsh. Not a big deal, just something to remember. I had to edit remoteshell= ssh instead of rsh in dsh.conf.

Additionally, I edited /etc/ssh_config on the XS to say "StrictHostKeyChecking no" to automatically approve the XOs rsa keys.

On the XOs, I had to edit sshd_config for "PubkeyAuthentication yes" It is critical to set the permissions correctly for /home/olpc/.ssh and /home/olpc/.ssh/authorized_keys, otherwise ssh and dsh won't work.

chmod 700 ~/.ssh
chmod 600 ~/.ssh/authorized_keys

Now the fun of "commanding a legion of XOs!" Here are some little things I've tried:

Get a list of the XOs by Buddy name:

dsh -Mac cat /home/olpc/.sugar/default config | grep nickname

See how much free space is on the nand:

dsh -Mac df -h | grep mtd0

Install an activity (this can probably be condensed into fewer commands):